Voltage Controlled Amplifier Circuit

A current ilsc is inserted into this input which controls the gain of the device linerly.

Voltage controlled amplifier circuit.

How to build a voltage controlled oscillator circuit with a 4046 chip. An amplifier electronic amplifier or informally amp is an electronic device that can increase the power of a signal a time varying voltage or current it is a two port electronic circuit that uses electric power from a power supply to increase the amplitude of a signal applied to its input terminals producing a proportionally greater amplitude signal at its output. Thus by inserting an audio signal 10 mv within pin 2 and 3 and with controlling the current on pin 5 the amount of the signal output pin 6 is controlled. Vcrs manufactured in this way can be obtained as.

This voltage controlled amplifier circuit is simply an op amp having an additional input at pin 5. This type of circuit has many applications including audio level compression synthesizers and amplitude modulation. A voltage controlled amplifier can be realised by first creating a voltage controlled resistor vcr which is used to set the amplifier gain. The vcr is one of the numerous interesting circuit elements that can be produced by using a jfet junction field effect transistor with simple biasing.

A variable gain or voltage controlled amplifier is an electronic amplifier that varies its gain depending on a control voltage. The amplifier can achieve an 80 db dynamic control range with less than 0 2. So for example if we input 1v into the circuit we can get 10v as output if we set the circuit for a gain of 10.